The most common criticism I’ve received is that this is no big deal and “duh, so what if f and t look similar upside down”. Well, I don’t think that is the entire story because it is only applicable to lowercase f and t and you still have to have to flip AND rotate because just turning upside down doesn’t cut it.

Update #2: Buzzfeed has feeds in the footer of several other prominent sites. Here are two worth mentioning: